摘要:
A semiconductor memory device has a sense amplifier which is constructed with a level shift circuit having an input which senses the change in a data line from an initial precharged level to a level near the vicinity of the supply voltage level which corresponds to data reading amounts from a memory cell during the reading mode of operation of the memory. The level shift circuit, in response to a memory cell reading signals, provides a level shifted output to the input terminal of a differential sense amplifier circuit, the level shifted output being in the vicinity of the operating point of the differential sense amplifier circuit. The level shift circuit includes a current amplifier having an output terminal that is formed with a series connecting node of a current amplifying transistor and a current source.
摘要:
A semiconductor memory device has a sense amplifier which is constructed with a level shift circuit having an input which senses the change in a data line from an initial precharged level to a level near the vicinity of the supply voltage level which corresponds to data reading amounts from a memory cell during the reading mode of operation of the memory. The level shift circuit, in response to a memory cell reading signals, provides a level shifted outpout to the input terminal of a differential sense amplifier circuit, the level shifted output being in the vicinity of the operating point of the differential sense amplifier circuit. The level shift circuit includes a current amplifier having an output terminal that is formed with a series connecting node of a current amplifying transistor and a current source.
摘要:
A signal transmission circuit in which a signal is converted into two complementary signals which are outputted from a signal transmission circuit via series resistors. The amplitude of each of the complimentary signals is reduced by the series resistors and terminating resistors provided on a signal receiving side. The signal receiving side shifts the level of the signals which it inputs. The level shifted signals are amplified by a high-input impedance differential amplifying circuit.
摘要:
A rate conversion circuit area (8) is provided between a spread gate area (4) which operates in synchronization with a clock signal CLK and a RAM core (7) (macro cell) operating in synchronization with a clock signal (ck) whose frequency is higher than that of the clock signal (CLK). With this arrangement, the single port core is made accessible as a dual port RAM by forming the clock signal (ck) whose frequency is multiplied an optional number of times that of the clock signal (CLK), receiving access data equivalent to a plurality of operating cycles in parallel from the spread gate area during a predetermined unit operating access cycle period in the spread gate area, and serially supplying these to the RAM core 7 during the plurality of operating cycle periods in synchronization with the clock signal (ck).
摘要:
A memory array of a static RAM or the like is divided in a word line extending direction to constitute a plurality of sub memory arrays SM0 to SM7, and array selecting signals for selecting the sub memory arrays and sub word line selecting signals for selecting sub word lines are combined to form word line selecting signals selectively. Main word lines M0000 to M0003 for transmitting those word line signals are arranged in parallel with the sub word lines SW000 to SW255. Sub word line drive circuits SWD000 to SWD255 are also coupled to the individual sub word lines for bringing the corresponding sub word lines selectively into selected states by combining at least 2 bits of the word line selecting signals.
摘要:
Each memory cell of the memory array has a latch circuit, such as a pair of cross-connected CMOS inverters, for storing information, a first switch MOSFET whose gate is connected with a word line, and a second switch MOSFET which is connected in series with the first switch MOSFET and the gate of which is connected with the output terminal of the latch circuit. The first and second switch MOSFETs are coupled between the data line and a terminal supplied with a first power source voltage level, such as reference ground potential. Such memory cells are disposed at intersections of a plurality of data lines and a plurality of word lines. One of the plurality of data lines is connected with a common data line through a column switch which is alternatively brought into an ON state. Prior to a reading operation, the data lines are precharged to the first power-source voltage level, or ground potential, and the common data line is precharged to a second power-source voltage level, such as the supply voltage of the memory.
摘要:
Each memory cell of the memory array has a latch circuit, such as a pair of cross-connected CMOS inverters, for storing information, a first switch MOSFET whose gate is connected with a word line, and a second switch MOSFET which is connected in series with the first switch MOSFET and the gate of which is connected with the output terminal of the latch circuit. The first and second switch MOSFETs are coupled between the data line and a terminal supplied with a first power source voltage level, such as reference ground potential. Such memory cells are disposed at intersections of a plurality of data lines and a plurality of word lines. One of the plurality of data lines is connected with a common data line through a column switch which is alternatively brought into an ON state. Prior to a reading operation, the data lines are prechanged to the first power-source voltage level, or ground potential, and the common data line is precharged to a second power-source voltage level, such as the supply voltage of the memory. The memory array is implemented in a semiconductor storage device, such as a static RAM, which is characterized as operating either as a one-port or two-port system and wherein it, furthermore, employs a write amplifier circuit arrangement and a sense amplifier arrangement, such as of the single-ended differential type, wherein the write and sense amplifier arrangements can be disposed either on separate common data lines or on a single common data line.
摘要:
Write column selection MOSFETs of memory cells MC are coupled with, for example, the earth potential of the circuit. Write column selection signals supplied to these MOSFETs are formed selectively according to the column selection address signal and the write data. Thereby the write column selection MOSFETs of the memory cells MC function as a substantial write means. That is, the write column selection signal lines are used as the data lines at the same time.
摘要:
A signal transmission circuit in which a signal is converted into two complementary signals which are outputted from a signal transmission circuit via series resistors. The amplitude of each of the complimentary signals is reduced by the series resistors and terminating resistors provided on a signal receiving side. The signal receiving side shifts the level of the signals which it inputs. The level shifted signals are amplified by a high-input impedance differential amplifying circuit.
摘要:
A compressor of the rotary vane type including an annular space dormed inside a rotor for communicating vane slots formed in the rotor in communication with one another and for storing lubricant therein. As vanes each received in one of the vane slots move in radial sliding reciprocatory movement in the respective vane slots, the vanes are lubricated at their surfaces by the lubricant.